ACT Science

Front

In the same experiment mentioned above, if a researcher hypothesizes that increasing light intensity continuously increases plant growth, how does the data support or refute this hypothesis? Options: Supports, as plant height increases with light intensity up to 2500 lux; Refutes, as plant height does not increase beyond 2000 lux; Supports, as plant height decreases with light intensity; Refutes, as there is no clear pattern in plant growth with different light intensities

Back

Refutes, as plant height does not increase beyond 2000 lux

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DOK Level 3: Strategic Thinking

Front

Consider an experiment where two variables are tested: soil type and amount of water for growing tomatoes. The researcher keeps the amount of light constant. Which of the following is the dependent variable?

Back

Growth of tomatoes

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DOK Level 2: Skill/Concept

Front

A data table shows the pH levels of soil and the corresponding growth rate of bean plants. If a student needs to predict the growth rate at a pH of 6.5 based on a trend, what type of reasoning is primarily being used?

Back

Inductive reasoning

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DOK Level 2: Skill/Concept

Front

Given the same data on yeast fermentation, if a student hypothesizes that fermentation rate increases linearly with temperature, what does the data suggest about this hypothesis?

Back

Refutes, as the rate peaks and then decreases

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DOK Level 3: Strategic Thinking

Front

In a controlled experiment, a biologist studies the impact of different amounts of sunlight on the life span of a certain type of algae. If the biologist keeps the water temperature and nutrient levels constant, which of the following is an independent variable?

Back

Amount of sunlight

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DOK Level 2: Skill/Concept

Front

A table shows the average daily temperatures and the number of visitors at a park. If a student is asked to determine the relationship between temperature and visitor numbers, what type of analysis are they performing?

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Correlational analysis

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DOK Level 2: Skill/Concept

Front

Considering the data on plant growth under different soil pH levels, which pH level supports maximum growth according to the following data?
| Soil pH Level | Average Growth (cm) |
|---------------|---------------------|
| 4.5 | 12 |
| 5.5 | 15 |
| 6.5 | 18 |
| 7.5 | 16 |
| 8.5 | 14 |

Back

6.5

Front

If a study shows that increasing the concentration of a nutrient in a hydroponic solution increases the biomass of lettuce plants, what does this suggest about the nutrient's role?

Back

The nutrient is beneficial to lettuce growth.

Front

In an experiment testing the effect of light color on plant growth, which of the following would be considered the dependent variable? Options: Type of plant used, Color of light, Duration of light exposure.

Back

Growth rate of the plant

Front

Considering the impact of different nutrient concentrations on the growth of tomato plants, what can be inferred if increasing the concentration results in taller plants?

Back

The nutrient concentration positively affects growth.